Tapered write pole for reduced skew effect

ABSTRACT

A write pole for a read/write head of a disk drive system has a tapered surface on a leading edge thereof. Preferably, the tapered surface has a taper angle of between 0 and 20 degrees from a plane normal to the ABS. By having a write pole with a taper in this manner, sufficient write fields can be achieved even with thinner write pole tips on the ABS surface. By decreasing the thickness of the write pole tip in this manner while maintaining sufficiently high write fields, the skew profile of a write head can be decreased and areal density increased.

CROSS-REFERENCE TO RELATED PATENT APPLICATIONS

This patent application is a divisional of, and claims priority under 35U.S.C. §120 to, U.S. patent application Ser. No. 10/993,915, that isentitled “TAPERED WRITE POLE FOR REDUCED SKEW EFFECT”, and it was filedon Nov. 18, 2004, which claims priority from U.S. ProvisionalApplication No. 60/523,556, filed Nov. 20, 2003, entitled “TAPERED WRITEPOLE FOR REDUCED SKEW EFFECT”. The entire disclosure of each of theseapplications is incorporated herein by reference in their entiretyherein.

FIELD OF THE INVENTION

This application relates to techniques and arrangements for write headsin data storage applications, particularly geometries and processes forachieving geometries of write heads that reduce skew effects.

BACKGROUND OF THE INVENTION

In hard disk drives, data is written to and read from magnetic recordingmedia, herein called disks. Typically, one or more disks having a thinfilm of magnetic material coated thereon are rotatably mounted on aspindle. A read/write head mounted on a pivotably-mounted actuator armis positioned in close proximity to the disk surface to write data toand read data from the disk surface.

During operation of the disk drive, the actuator arm moves theread/write head to the desired radial position on the surface of therotating disk where the read/write head electromagnetically writes datato the disk and senses magnetic field signal changes to read data fromthe disk. Usually, the read/write head is integrally mounted in acarrier or support referred to as a slider. The slider generally servesto mechanically support the read/write head and any electricalconnections between the read/write head and the disk drive. The slideris aerodynamically shaped, which allows it to fly over and maintain auniform distance from the surface of the rotating disk.

Typically, the read/write head includes a magnetoresistive read elementto read recorded data from the disk and an inductive write element towrite the data to the disk. The read element includes a thin layer of amagnetoresistive sensor stripe sandwiched between two magnetic shieldsthat may be electrically connected together but are otherwise isolated.A current is passed through the sensor stripe, and the resistance of themagnetoresistive stripe varies in response to a previously recordedmagnetic pattern on the disk. In this way, a corresponding varyingvoltage is detected across the sensor stripe. The magnetic shields helpthe sensor stripe to focus on a narrow region of the magnetic medium,hence improving the spatial resolution of the read head.

The write element typically includes a coil of wire through whichcurrent is passed to create a magnetic field that can be directed towardan adjacent portion of the disk by a ferromagnetic member known as awrite pole. While it is known that the write element can be arranged toeither store data longitudinally or perpendicularly on the disk, most,if not all, commercial disk drives to date have utilized longitudinalrecording arrangements. Although perpendicular recording techniques havethe potential to allow for higher densities of recorded information,longitudinal recording is used in all current products for historicalreasons. An early perpendicular recording technique is disclosed in U.S.Pat. No. RE33,949, the contents of which are incorporated herein byreference.

The '949 patent discloses a perpendicular or vertical write head with awrite pole section, downstream shield section, and a pancake coilsurrounding the write pole section to generate magnetic flux therein.The shield section is disclosed to have a surface facing toward themedia that is many times larger than a similarly-oriented face of thewrite pole. The media is disclosed to include two layers, an upper layercloser to the head having perpendicular uniaxial. anisotropy and a lowerlayer having low magnetic reluctance (now known as the Soft Under Layer(SUL)). A high write field can then be produced between the write poleand the SUL to record information in the upper layer of the media. Thewrite flux returns through the SUL to the downstream write shield.

Due to the pivotable mounting of the actuator arm, the angular alignmentof the read/write head to a particular data track on the adjacentstorage disk can vary based on the radial position of the data track ona disk. In other words, the angular alignment at a data track near theinner diameter of the media surface on the disk will be different thanthe angular alignment near the outer diameter of the media surface onthe disk. This phenomenon is known as skew or the skew angle, and theprofile of such skew angles across the different radial portions of thedisk is known as the skew profile. As can be appreciated, depending ondesign criteria, it is possible for the disk drive system to be designedso that the relative angular alignment is optimal at the outer diameterand the greatest amount of skew angle is achieved at the inner diameter.Conversely, the design could optimize the skew angle at the innerdiameter and have the least optimal skew angle at the outer diameter, orthe optimal angular alignment could be achieved somewhere in between theinner or outer diameter. In modern disk drive systems, the worst-caseskew angle may typically be in a range of 15 to 20 degrees (e.g., 17degrees).

It should be understood that a primary difference between longitudinalrecording and perpendicular recording is that with longitudinalrecording the magnetic field is primarily generated in the write gapbetween the write pole tip and the return pole tip, while inperpendicular recording the magnetic field is primarily generated in theregion between the write pole tip and the soft underlayer in themagnetic media. Thus, with perpendicular recording, the field will begenerated in a cross-sectional area that corresponds to the footprint ofthe write pole tip appearing at the ABS. It can then be appreciated thatit is desirable for the footprint of a write pole tip to be minimized.It can also be appreciated that significant skew angles produce afootprint that is skewed relative to the data recording track andcreates a portion in the track where some of the data recorded is viaside writing from a side edge of the footprint, which is undesirable. Inorder to reduce this effect, write pole tips for perpendicular recordingmay typically be trapezoidal in shape rather than rectangular. The sidebevel angle on the write pole tip (the extent to which the lateral sideof the write pole tip deviates from a 90 degree angle with the leadingor trailing edge) determines the amount of bevel of the trapezoidalhead. Unfortunately, there are limits to the amount of side bevel in atrapezoidal head that is desirable. Typically, it is not desirable tohave a bevel greater than 10 degrees because of the lost cross-sectionalarea that a bevel creates, which reduces write flux, write field, andeventually areal density.

It is desirable to design a write head which does not suffer from theabove drawbacks. It is against this background and a desire to improveon the prior art that the present invention has been developed.

SUMMARY OF THE INVENTION

In view of the foregoing, a broad objective of the present invention isto provide a read/write head with reduced skew effect.

In carrying out these and other objectives, features, and advantages ofthe present invention, a read/write head for a disk drive is described,the head being suitable for recording data in adjacent magneticrecording media, the media including a first layer for recording dataand a second layer that is a soft underlayer (SUL) to return magneticflux to the read/write head. The head includes a read transducer and awrite transducer that includes a write pole and a write coil. The writepole has a tapered surface on a side that is generally perpendicular tothe direction of relative motion between the read/write head and theadjacent magnetic recording media, the magnitude of the taper being lessthan 20 degrees.

The magnitude of the taper may be less than 15 degrees. The magnitude ofthe taper may be more than 5 degrees. The magnitude of the taper may bebetween 7 and 13 degrees. The magnitude of the taper may beapproximately 10 degrees.

The write transducer also may include a write shield. The taperedsurface may be on an opposite side of the write pole from the writeshield. The tapered surface may be on a side of the write pole facingthe write shield. The tapered surface may be on a leading side or atrailing side of the write pole.

The write pole may have a thickness on an ABS side thereof that is lessthan 300 nanometers from a leading edge to a trailing edge thereof. Thetapered surface may be generally planar. The tapered surface may includea series of cascading steps. The write pole may have an ABS and thedistance from the ABS to a first step may be equal to or greater thanthe distance from the ABS to the SUL.

The invention may also relate to a method for producing a tapered writepole in a read/write head for a disk drive. The method includesproviding a substrate; applying a photo resist mask to a portion of thesubstrate; depositing an insulative material to a portion of thesubstrate adjacent to the photo resist mask, at least a portion of theinsulative material being formed in a ramp; removing the photo resistmask; applying a write pole tip layer on top of the substrate andinsulative ramp; planarizing the write pole tip layer and insulativeramp to substantially create a plane; and lapping the entire structurefrom a direction generally parallel to the plane to create an ABSsurface.

The insulative material may be aluminum oxide. The ramp shape to theinsulative layer may be created by sweeping the angle of deposition indepositing the insulative layer. Ion beam deposition may be used. Theslope of the ramped insulative layer relative to the substrate may beless than 20 degrees, less than 15 degrees, more than 5 degrees, between7 and 13 degrees, or approximately 10 degrees.

The substrate may include a write yoke. The substrate may include othercomponents of a write transducer. The substrate may include othercomponents of a read transducer. The ramp may be generally planar. Theramp may include a series of cascading steps. The disk drive may includea magnetic storage disk adjacent to the head, the disk having an SUL,wherein the distance from the ABS to a first step may be equal to orgreater than the distance from the ABS to the SUL.

The invention may also relate to a method for producing a tapered writepole in a read/write head for a disk drive. The method may includeproviding a substrate; depositing an insulative material to thesubstrate, at least a portion of the insulative material forming a ramp;applying a write pole tip layer to the structure so that the write poletip has a tapered surface corresponding to the ramp; and lapping theentire structure to create an ABS surface.

Numerous additional features and advantages of the present inventionwill become apparent to those skilled in the art upon consideration ofthe further description that follows.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a side view of portions of a read/write head according to thepresent invention adjacent to a magnetic storage disk.

FIG. 2 is a view like FIG. 1, showing an alternative embodiment for theread/write head of the present invention.

FIG. 3 is a side view of a portion of the read/write head during amanufacturing process step.

FIG. 4 is a view like FIG. 3 showing the read/write head at a later timein the manufacturing process.

FIG. 5 is a view like FIG. 4 showing the read/write head in an evenlater point in the manufacturing process.

FIG. 6 is a view similar to FIG. 1 showing an alternative embodiment ofa read/write head of the present invention.

FIG. 7 is a top view of a disk drive system that utilizes a read/writehead of the present invention.

FIG. 8 is a view like FIG. 1, showing another alternative embodiment forthe read/write head of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Reference will now be made to the accompanying drawings, which assist inillustrating the various pertinent features of the present invention.Although the present invention will now be described primarily inconjunction with disk drives, it should be expressly understood that thepresent invention may be applicable to other applications where magneticrecording of data is required/desired. In this regard, the followingdescription of a disk drive is presented for purposes of illustrationand description. Furthermore, the description is not intended to limitthe invention to the form disclosed herein. Consequently, variations andmodifications commensurate with the following teachings, and skill andknowledge of the relevant art, are within the scope of the presentinvention. The embodiments described herein are further intended toexplain best modes known of practicing the invention and to enableothers skilled in the art to utilize the invention in such, or otherembodiments and with various modifications required by the particularapplication(s) or use(s) of the present invention.

FIG. 7 illustrates one embodiment of a disk drive 10. The disk drive 10generally includes a base plate 12 and a cover (not shown) that may bedisposed on the base plate 12 to define an enclosed housing or space forthe various disk drive components. The disk drive 10 includes one ormore data storage disks 14 of any appropriate computer-readable datastorage media. Typically, both of the major surfaces of each datastorage disk 14 include a plurality of concentrically disposed tracksfor data storage purposes. Each disk 14 is mounted on a hub or spindle16, Which in turn is rotatably interconnected with the disk drive baseplate 12 and/or cover. Multiple data storage disks 14 are typicallymounted in vertically spaced and parallel relation on the spindle 16.Rotation of the disk(s) 14 is provided by a spindle motor 18 that iscoupled to the spindle 16 to simultaneously spin the data storagedisk(s) 14 at an appropriate rate.

The disk drive 10 also includes an actuator arm assembly 20 that pivotsabout a pivot bearing 22, which in turn is rotatably supported by thebase plate 12 and/or cover. The actuator arm assembly 20 includes one ormore individual rigid actuator arms 24 that extend out from near thepivot bearing 22. Multiple actuator arms 24 are typically disposed invertically spaced relation, with one actuator arm 24 being provided foreach major data storage surface of each data storage disk 14 of the diskdrive 10. Other types of actuator arm assembly configurations could beutilized as well, such as an “E” block having one or more rigid actuatorarm tips or the like that cantilever from a common structure. In anycase, movement of the actuator arm assembly 20 is provided by anactuator arm drive assembly, such as a voice coil motor 26 or the like.The voice coil motor 26 is a magnetic assembly that controls theoperation of the actuator arm assembly 20 under the direction of controlelectronics 28. Any appropriate actuator arm assembly drive type may beutilized by the disk drive 10, including a linear drive (for the casewhere the actuator arm assembly 20 is interconnected with the base plate12 and/or cover for linear movement versus the illustrated pivotingmovement about the pivot bearing 22) and other types of rotationaldrives.

A load beam or suspension 30 is attached to the free end of eachactuator arm 24 and cantilevers therefrom. Typically, the suspension 30is biased generally toward its corresponding disk 14 by a spring-likeforce. A slider 32 is disposed at or near the free end of eachsuspension 30. What is commonly referred to as the “head” (e.g.,transducer) is appropriately mounted on the slider 32 and is used indisk drive read/write operations.

The head on the slider 32 may utilize various types of read sensortechnologies such as anisotropic magnetoresistive (AMR), giantmagnetoresistive (GMR), tunneling magnetoresistive (TuMR), othermagnetoresistive technologies, or other suitable technologies. AMR isdue to the anisotropic magnetoresistive effect with a normalized changein resistance (ΔR/R) of 2-4%. GMR results from spin-dependent scatteringmechanisms between two (or more) magnetic layers. The typical use inrecording heads is the spin valve device that uses a pinned magneticlayer and a free layer to detect external fields. The normalized changein resistance is typically 8-12%, but can be as large as 15-20% whenused with specular capping layers and spin-filter layers. TuMR issimilar to GMR, but is due to spin dependent tunneling currents acrossan isolation layer. The typical embodiment includes a free layer and apinned layer separated by a insulating layer of Al₂O₃ with the currentflowing perpendicular to the film plane, producing normalized change inresistance of 12-25%. The term magnetoresistive is used in thisapplication to refer to all these types of magnetoresistive sensors andany others in which a variation in resistance of the sensor due to theapplication of an external magnetic field is detected. The writetransducer technology of the head of the present invention is discussedin further detail below.

The biasing forces exerted by the suspension 30 on its correspondingslider 32 thereby attempt to move the slider 32 in the direction of itscorresponding disk 14. Typically, this biasing force is such that if theslider 32 were positioned over its corresponding disk 14, without thedisk 14 being rotated at a sufficient velocity, the slider 32 would bein contact with the disk 14.

The head on the slider 32 is interconnected with the control electronics28 of the disk drive 10 by a flex cable 34 that is typically mounted onthe actuator arm assembly 20. Signals are exchanged between the head andits corresponding data storage disk 14 for disk drive read/writeoperations. In this regard, the voice coil motor 26 is utilized to pivotthe actuator arm assembly 20 to simultaneously move the slider 32 alonga path 36 and “across” the corresponding data storage disk 14 toposition the head at the desired/required radial position on the disk 14(i.e., at the approximate location of the correct track on the datastorage disk 14) for disk drive read/write operations.

When the disk drive 10 is not in operation, the actuator arm assembly 20is pivoted to a “parked position” to dispose each slider 32 generally ator beyond a perimeter of its corresponding data storage disk 14, but inany case in vertically spaced relation to its corresponding disk 14.This is commonly referred to in the art as being a dynamic load/unloaddisk drive configuration. In this regard, the disk drive 10 includes aramp assembly 38 that is disposed beyond a perimeter of the data storagedisk 14 to typically both move the corresponding slider 32 verticallyaway from its corresponding data storage disk 14 and to also exertsomewhat of a retaining force on the actuator arm assembly 20. Anyconfiguration for the ramp assembly 38 that provides the desired“parking” function may be utilized. The disk drive 10 could also beconfigured to be of the contact start/stop type, where the actuator armassembly 20 would pivot in a direction to dispose the slider(s) 32typically toward an inner, non-data storage region of the correspondingdata storage disk 14. Terminating the rotation of the data storagedisk(s) 14 in this type of disk drive configuration would then result inthe slider(s) 32 actually establishing contact, with or “landing” on itscorresponding data storage disk 14, and the slider 32 would remain onthe disk 14 until disk drive operations are re-initiated.

The slider 32 of the disk drive 10 may be configured to “fly” on an airbearing during rotation of its corresponding data storage disk(s) 14 ata sufficient velocity. The slider 32 may be disposed at a pitch anglesuch that its leading edge is disposed further from its correspondingdata storage disk 14 than its trailing edge. The head would typically beincorporated on the slider 32 generally toward its trailing edge sincethis is positioned closest to its corresponding disk 14. Other pitchangles/orientations could also be utilized for flying the slider 32.

As shown in FIG. 1, a write head pole region 50 of a read/write headincludes a portion of a write pole 52 and possibly a write shield 54.The present invention is equally applicable to shielded as well asunshielded write pole designs (e.g., monopole designs). The head 50 ispositioned so that the write pole 52 and write shield 54 are adjacent toa magnetic storage disk 56 having an SUL. Typically, the disk drivesystem will be configured so that the magnetic storage disk 56 is movedrelative to the write head 50, although it is possible for the head 50to be moved relative to the storage disk 56. Also, most typically thestorage disk 56 is moved in a direction from right to left as viewingthe arrangement in FIG. 1. Thus, a specific portion of the magneticstorage disk 56 would move by the write pole 52 prior to moving by thewrite shield 54.

In referring to components in the head 50, it is common to refer to oneside of a component as being at the leading edge or side of thecomponent if it is on the side of the component that a particularportion of the magnetic storage disk 56 passes by prior to passing otherportions of the component. Similarly, it is common to refer to a side ofa component on the head 50 that is last passed by a specific portion ofthe storage disk 56 as the trailing edge or side of the component. Otherterminology such as upstream and downstream portions and otheralternatives may also be used.

As can be seen in FIG. 1, the write pole 52 has a side facing themagnetic storage disk 56 that is generally planar and parallel to theupper surface of the storage disk 56. This side of the write pole 52 isreferred to as the ABS side 58. The write pole 52 also has sidesgenerally facing in the direction of the observer when viewing FIG. 1and on an opposite side thereof. These lateral sides are not depicted inany detail in FIG. 1. The write pole 52 also has a trailing side 62 thatgenerally faces toward the write shield 54, is generally planar in aregion near the ABS side 58, and is generally perpendicular to the ABSside 58. The write pole 52 also has a leading side 60 that is generallyon an opposite face from the trailing side 62 and thus faces away fromthe write shield 54. In this embodiment, the leading side 60 isgenerally planar in the region near the ABS side and is not preciselyperpendicular to the ABS side, but is closer to perpendicular to the ABSside than parallel thereto. Thus, this leading side may be said to begenerally perpendicular to the direction of travel. As can be seen inFIG. 1, these characteristics cause the write pole 52 to be tapered inthe region near the ABS side 58. The magnitude of this taper can beexpressed as the taper angle, which is the angle between a planeperpendicular to the ABS side 58 yet parallel to the trailing side 62and the plane formed by the leading side 60. For example, in thisembodiment, the taper angle is approximately 10 degrees (although thedrawing may not be exactly to scale). The taper angle may also bereferred to as a leading edge bevel, which should not be confused withthe side bevel inherent in a trapezoidal footprint. Although not shownin FIG. 1, the write pole 52 may have a trapezoidal footprint.

It has been discovered that write poles with non-zero taper anglesprovide a greater write field for a given pole thickness than do writepoles with a zero taper. Further, the dependence of the amplitude of thewrite field on the taper angle is greater with smaller write polethicknesses. In this discussion, the write pole thickness refers to thelength of the ABS side 58 of the write pole 52 as shown in FIG. 1. Inother words, it is the length of the ABS side 58 from the trailing side62 to the leading side 60. From this discovery, it can be seen that withthe use of tapered write poles it is possible to produce a given writefield with a write pole of lesser thickness. Reducing the thickness ofthe write pole reduces the skew effect as it reduces the length of thelateral edge of the footprint at the ABS and the area of the lateralside of the write pole. Thus, it can be seen that through the use oftrapezoidal-shaped write poles (in a footprint sense) that are alsotapered (as viewed in FIG. 1), the skew profile can be greatly reduced.

For example, it has been found that with distances of 50 nanometers fromthe ABS side 58 to the SUL of the magnetic storage disk 56 and polethicknesses in the range of 250 nanometers that a trapezoidal shapedhead having a bevel of 10 degrees that is also tapered with a taperangle of 10 degrees can greatly reduce the skew profile of the head. Ithas been discovered that this enhanced effect to the write fieldcontinues as the taper angle is made greater. However, as the taperangle becomes greater, it may become more difficult to control the polethickness. This difficulty arises because the amount of lapping back ofthe head in the manufacturing process is much more critical since thetaper and the amount of lapping together determine the pole thickness.For this reason, it has been found that taper angles less than 20degrees are preferred. More specifically, it is preferred for taperangles to be between 5 and 15 degrees. Even more specifically, it hasbeen found that taper angles between 7 and 13 degrees may work best. Asstated above, in this specific embodiment, a taper angle of 10 degreesis used. It should also be understood that only small portions of thewrite head 50 and of the combined read/write head are shown in FIG. 1.In particular, there is a read transducer that is not shown. Further,there are write coils that are not shown as well as the fact that onlyportions of the write shield 54 and write pole 52 are illustrated. Otherarrangements that include having a tapered trailing or leading side on awrite pole are considered to fall within the invention described herein.

FIG. 2 discloses a somewhat similar approach, with the primarydifference being that the tapered surface of the write pole is on atrailing side, or a side facing toward the write shield (if the designincludes a write shield) rather than away from the write shield. FIG. 8shows a similar arrangement to that shown in FIG. 2, with the differencebeing that the side of the write shield facing toward the write pole issimilarly tapered so that the two facing sides are parallel. With thisarrangement, the write gap between the write pole and the write shieldsis constant and thus the magnitude of the effective write gap is notmade a function of how precisely one can control the lapping process.

An exemplary process for manufacturing the tapered write pole 52 as partof the write head 50 is illustrated in FIGS. 3, 4, and 5. Of course,several minor and major components of the head 50 have been omitted forease of illustration and explanation. In FIG. 5, a substrate 70 on awafer is shown with a write yoke 72 having already been depositedthereon. The write yoke 72 has been deposited, encapsulated, andplanarized with chemo-mechanical polishing (CMP). A photoresist mask 74has been placed on top of the write yoke 72 and FIG. 3 illustrates theion beam deposition (IBD) of aluminum oxide (Al₂O₃) and a swept orcontinuously varying deposition angle. As can be seen, this depositionprocess creates a ramped deposit of Al₂O₃ 76 on the substrate 70.

Next, the photoresist mask 74 is lifted off and a write pole tip layer78 is deposited on top of the write yoke 72 and ramped Al₂O₃ deposit 76as is shown in FIG. 4. The write pole tip layer 78 can be patterned byion milling as necessary.

Next, the write pole tip layer 78 is encapsulated with Al₂O₃ and CMP isused to planarize it. This yields a structure such as is shown in FIG.5. Lapping is then performed to the ends of a plurality of heads thatare in bar form. The lapping generally removes all of the material tothe right of the dashed line 84 in FIG. 5 to define the final ABS or ABSside 58. As can be appreciated, the resulting structure has a taperedside facing toward the substrate 70.

An alternative process is discussed in conjunction with FIG. 6. FIG. 6shows a write head pole region 90 (of a read/write head) having a writepole 92 and a write shield 94. The head 90 is adjacent to a magneticstorage disk 96. As can be seen, the taper in the write pole 92 isillustrated as not being exactly planar in shape. Instead, the taper isachieved by a series of process steps that produce a stepped edge thatapproximates a taper. The process steps could include additive steps,subtractive steps, or any other suitable methodology. One example ofstep heights and spacing may be step heights and widths of 20nanometers. The steps and heights should be selected appropriate toprovide the desired effective taper angle of approximately 10 degrees.

It can also be appreciated that this invention is distinguishable from asomewhat similar disclosure from Hitachi in 2000. M. Mochizuke et al.,J. of Magnetism and Magnetic Materials 235, p. 194, FIG. 8 (2001). Inthis disclosure, a write pole is produced and then a 45 degree bevel iscut-out at the ABS. Unfortunately, it is very difficult to manufacture awrite head in this manner since it is difficult to ion mill the writehead at the ABS in an accurate and economical method that has minimaldefects.

The foregoing description of the present invention has been presentedfor purposes of illustration and description. Furthermore, thedescription is not intended to limit the invention to the form disclosedherein. Consequently, variations and modifications commensurate with theabove teachings, and skill and knowledge of the relevant art, are withinthe scope of the present invention. The embodiments describedhereinabove are further intended to explain best modes known ofpracticing the invention and to enable others skilled in the art toutilize the invention in such, or other embodiments and with variousmodifications required by the particular application(s) or use(s) of thepresent invention. It is intended that the appended claims be construedto include alternative embodiments to the extent permitted by the priorart.

1. A method for producing a tapered write pole in a read/write head fora disk drive, the method comprising: providing a substrate; applying aphoto resist mask to a portion of the substrate; depositing aninsulative material to a portion of the substrate adjacent to the photoresist mask, at least a portion of the insulative material being formedin a ramp; removing the photo resist mask; applying a write pole tiplayer on top of the substrate and insulative ramp; planarizing the writepole tip layer and insulative ramp to substantially create a plane; andlapping the entire structure to create an ABS surface, wherein the slopeof the ramped insulative material relative to the substrate is less than15 degrees.
 2. A method as defined in claim 1, wherein the insulativematerial is aluminum oxide wherein the ramp shape to the insulativematerial is created by sweeping the angle of deposition in depositingthe insulative material and wherein ion beam deposition is used.
 3. Amethod as defined in claim 1, wherein the slope of the ramped insulativematerial relative to the substrate is more than 5 degrees.
 4. A methodas defined in claim 1, wherein the slope of the ramped insulativematerial relative to the substrate is approximately 10 degrees.
 5. Amethod as defined in claim 1, wherein the substrate includes a writeyoke, wherein the substrate includes other components of a writetransducer and wherein the substrate includes other components of a readtransducer.
 6. A method as defined in claim 1, wherein the ramp isgenerally planar.
 7. A method as defined in claim 1, wherein the rampincludes a series of cascading steps.
 8. A method as defined in claim 7,wherein the disk drive includes a magnetic storage disk adjacent to thehead, the disk having an SUL, wherein the distance from the ABS to afirst step is equal to or greater than the distance from the ABS to theSUL.
 9. The method as recited in claim 1, wherein the tapered write polehas a thickness on the ABS surface less than 300 nanometers from aleading edge to a trailing edge thereof.
 10. A method for producing atapered write pole in a read/write head for a disk drive, the methodcomprising: providing a substrate; depositing an insulative material tothe substrate, at least a portion of the insulative material forming aramp; applying a write pole tip layer to the structure so that the writepole tip has a tapered surface corresponding to the ramp; and lappingthe entire structure to create an ABS surface, wherein the slope of theramped insulative material relative to the substrate is less than 15degrees.
 11. A method as defined in claim 10, wherein the insulativematerial is aluminum oxide, wherein the ramp shape to the insulativematerial is created by sweeping the angle of deposition in depositingthe insulative material and ion beam deposition is used.
 12. A method asdefined in claim 10, wherein the slope of the ramped insulative materialrelative to the substrate is more than 5 degrees.
 13. A method asdefined in claim 10, wherein the substrate includes a write yoke,wherein the substrate includes other components of a write transducerand wherein the substrate includes other components of a readtransducer.
 14. A method as defined in claim 10, wherein the ramp isgenerally planar.
 15. A method as defined in claim 10, wherein rampincludes a series of cascading steps.
 16. A method as defined in claim15, wherein the disk drive includes a magnetic storage disk adjacent tothe head, the disk having an SUL and wherein the distance from the ABSto a first step is equal to or greater than the distance from the ABS tothe SUL.
 17. The method as recited in claim 10, wherein the taperedwrite pole has a thickness on the ABS surface less than 300 nanometersfrom a leading edge to a trailing edge thereof.
 18. A method forproducing a tapered write pole in a read/write head, the methodcomprising: forming a write pole tip so that the write pole tip has atapered surface on a side that is generally perpendicular to a directionof relative motion between the head and an adjacent recording media; andproviding a ramp formed of insulative material on a substrate andapplying a write pole tip layer to the insulative material so that thetapered surface of the write pole tip corresponds to the ramp, whereinthe slope of the ramped insulative material relative to the substrate isless than 15 degrees.
 19. A method as recited in claim 18, wherein thesubstrate, insulative material and write pole tip form a structure andthe method further comprises lapping the structure to create an ABSsurface.